00001 /*This file is prepared for Doxygen automatic documentation generation.*/ 00015 /* Copyright (c) 2009 Atmel Corporation. All rights reserved. 00016 * 00017 * Redistribution and use in source and binary forms, with or without 00018 * modification, are permitted provided that the following conditions are met: 00019 * 00020 * 1. Redistributions of source code must retain the above copyright notice, this 00021 * list of conditions and the following disclaimer. 00022 * 00023 * 2. Redistributions in binary form must reproduce the above copyright notice, 00024 * this list of conditions and the following disclaimer in the documentation 00025 * and/or other materials provided with the distribution. 00026 * 00027 * 3. The name of Atmel may not be used to endorse or promote products derived 00028 * from this software without specific prior written permission. 00029 * 00030 * 4. This software may only be redistributed and used in connection with an Atmel 00031 * AVR product. 00032 * 00033 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED 00034 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00035 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 00036 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR 00037 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00038 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00039 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00040 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00041 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00042 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE 00043 * 00044 */ 00045 00046 #include "dsp.h" 00047 00048 #if defined(FORCE_ALL_GENERICS) || \ 00049 defined(FORCE_GENERIC_GEN16_NOISE) || \ 00050 !defined(TARGET_SPECIFIC_GEN16_NOISE) 00051 00052 // rand()*amp 00053 void dsp16_gen_noise(dsp16_t *vect1, int size, dsp16_t amp) 00054 { 00055 int t; 00056 00057 // If amp == 1. then the signal is much faster to compute 00058 if (amp == DSP16_Q(1.)) 00059 { 00060 // Main loop 00061 for(t=0; t<size; t++) 00062 vect1[t] = dsp16_op_rand(); 00063 } 00064 else 00065 { 00066 // Main loop 00067 for(t=0; t<size; t++) 00068 // Get a pseudo-random sample and scale it with the desired amplitude 00069 vect1[t] = ((S32) dsp16_op_rand())*((S32) amp) >> DSP16_QB; 00070 } 00071 } 00072 00073 #endif 00074 00075 #if defined(FORCE_ALL_GENERICS) || \ 00076 defined(FORCE_GENERIC_GEN32_NOISE) || \ 00077 !defined(TARGET_SPECIFIC_GEN32_NOISE) 00078 00079 // rand()*amp 00080 void dsp32_gen_noise(dsp32_t *vect1, int size, dsp32_t amp) 00081 { 00082 int t; 00083 00084 // If amp == 1. then the signal is much faster to compute 00085 if (amp == DSP32_Q(1.)) 00086 { 00087 // Main loop 00088 for(t=0; t<size; t++) 00089 vect1[t] = dsp32_op_rand(); 00090 } 00091 else 00092 { 00093 // Main loop 00094 for(t=0; t<size; t++) 00095 // Get a pseudo-random sample and scale it with the desired amplitude 00096 vect1[t] = ((S64) dsp32_op_rand())*((S64) amp) >> DSP32_QB; 00097 } 00098 } 00099 00100 #endif